| 东濮凹陷下第三系沙河街组层序地层划分及盐岩成因探讨 |
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| 引用本文： | 陈发亮,李绪涛,朱晖,苗翠芝.东濮凹陷下第三系沙河街组层序地层划分及盐岩成因探讨[J].沉积学报,2000,18(3):384-388. |
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| 作者姓名： | 陈发亮 李绪涛 朱晖 苗翠芝 |
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| 作者单位： | 1 中原油田地质调查处 河南濮阳 457001; |
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| 摘 要： | 应用层序地层学理论,通过对地质、地化、古生物、钻井和测井资料进行综合分析,再现了东濮凹陷下第三系沙河街组地层沉积岩相古地理,并再次探讨了该地区分布广泛、厚度巨大的盐膏地层的成因及盐的来源问题,认为东濮凹陷大量的盐膏层属于一种潮湿气候条件下受深大断裂控制的深水成盐模式,这种模式由于大量盐膏层与生油岩同期形成并与大量沉积砂体相匹配故极有利于形成生储盖配置良好的岩性地层油气藏。
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| 关 键 词： | 层序地层 体系域 盐膏成因 下第三系 东濮凹陷 |
| 文章编号： | 1000-0550(2000)03-0384-05 |
| 收稿时间： | 1999-01-17 |
| 修稿时间： | 1999年1月17日 |
Partition of Sequence Strata and Discussion aboutSalt- rock Resource in Shahejie Formation of Eogene, Dongpu Depression |
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| CHEN Fa-liang,ZHU Hui,LI Xu-tao,MIAO Cui-zhi.Partition of Sequence Strata and Discussion aboutSalt- rock Resource in Shahejie Formation of Eogene, Dongpu Depression[J].Acta Sedimentologica Sinica,2000,18(3):384-388. |
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| Authors: | CHEN Fa-liang ZHU Hui LI Xu-tao MIAO Cui-zhi |
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| Institution: | 1 Survey Institute of Geology, Zhongyuan Petroleum Exploration Bureau, Puyang Henan 457001;2 Institute of Exploration and Development Zhongyuan Oilfield,Puyang Henan 457001 |
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| Abstract: | Dongpu depression is located in the southwest of Bohai Bay basin. The area is about 5300 square kilometers.The south is wide and the north is narrow. Lanliao fault controls its development and evolvement.
On the basis of sequence stratigraphic theory, the author analyzed of the geologic, seimic, geochemical, pale-obiological, drilling and logging data. There are two sequences (Sequence I and Sequence Ⅱ) and eight systemstracts(one sequence includes LST, TST, HST and FSST) has been identified in Shahejie and Dongying formation.They are all have clear characteristics in seimic, geologic, core and logging dada. In continental basin, the influ-ence of the three factors of tectonization, weather and sediments on sequence is different from that in marine basin,the weather is more important than that in marine sequence.
After the synthetical analysis of sedimentary facies markers, the author has made the sedimentary lithofaciespaleogeographic reconstruction of Shahejie formation of Eogene in Dongpu depres-sion. In this paper the author also re- discussed the resource and the formation of salt - rock, which distributedwidely and has a large thickness. The characteristics of chemical components, paleobiota, lithology and distributionof the salt - rock are different from the normal evaporite. It is not come from the evaporation of sea water. Com-bined the paleotectogenesis and the paleoclimate, the result of the study indicates that the salt- rock is originatefrom the hot bittern in deep earth and formed under a deep - water environment with a moist climate in Dongpudepression. The formed model is due to an event abruptly.
Development of salt - rock is related to tectonization of Lanliao fault but not the climate. The salt - rock is lo-cated in TST or HST and developed with source rock. It is advantageous to source rock by preventing it from oxy-gen. It can also provide heat and pressure for source rock to change into oil or gas. The salt - rock is tighter thanmudstone as seal - rock. Because of so many salt - rock formed with source rock and sand body, It is more propi-tious to form litho- reservoir which has a good matching relationship among source、reservoir and seal rock. |
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| Keywords: | sequence strata systems tract salt-rock resource Eogene Dongpu depression |
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